WO2012136640A3 - Headlight having light-emitting diodes - Google Patents

Headlight having light-emitting diodes Download PDF

Info

Publication number
WO2012136640A3
WO2012136640A3 PCT/EP2012/056037 EP2012056037W WO2012136640A3 WO 2012136640 A3 WO2012136640 A3 WO 2012136640A3 EP 2012056037 W EP2012056037 W EP 2012056037W WO 2012136640 A3 WO2012136640 A3 WO 2012136640A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
test signals
emitting diodes
test
line sections
Prior art date
Application number
PCT/EP2012/056037
Other languages
German (de)
French (fr)
Other versions
WO2012136640A2 (en
Inventor
Helge Hoffmann
Original Assignee
Jb-Lighting Lichtanlagentechnik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jb-Lighting Lichtanlagentechnik Gmbh filed Critical Jb-Lighting Lichtanlagentechnik Gmbh
Priority to EP12720439.4A priority Critical patent/EP2695488B1/en
Publication of WO2012136640A2 publication Critical patent/WO2012136640A2/en
Publication of WO2012136640A3 publication Critical patent/WO2012136640A3/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/23—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in series
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2632—Circuits therefor for testing diodes
    • G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The invention relates to a headlight comprising a plurality of light-emitting diodes as light sources. The aim of the invention is to rapidly detect and identify a defective diode between light-emitting diodes connected in series in line sections. Said aim is achieved by tapping test signals at taps, by checking said signals in an analysis device for deviations from target values, or by simply visually identifying a defective diode. In order to reduce the effort for wiring the test signals, several test signal lines leading away from individual taps are advantageously guided to buses via rectifier diodes as feedback preventers and are fed to the analysis device via said buses. During a test cycle, only one line section out of all the line sections having test signals leading to a common bus is activated respectively for obtaining the test signals associated with said line section, and the activation is successively advanced across all line sections.
PCT/EP2012/056037 2011-04-04 2012-04-03 Headlight having light-emitting diodes WO2012136640A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12720439.4A EP2695488B1 (en) 2011-04-04 2012-04-03 Headlight having light-emitting diodes

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102011001780 2011-04-04
DE102011001780.1 2011-04-04
DE102011053491.1 2011-09-12
DE102011053491A DE102011053491A1 (en) 2011-04-04 2011-09-12 Headlamps with LEDs

Publications (2)

Publication Number Publication Date
WO2012136640A2 WO2012136640A2 (en) 2012-10-11
WO2012136640A3 true WO2012136640A3 (en) 2013-03-21

Family

ID=46845093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/056037 WO2012136640A2 (en) 2011-04-04 2012-04-03 Headlight having light-emitting diodes

Country Status (3)

Country Link
EP (1) EP2695488B1 (en)
DE (1) DE102011053491A1 (en)
WO (1) WO2012136640A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012218772B3 (en) 2012-10-15 2014-10-30 Continental Automotive Gmbh Method and device for diagnosing a faulty light source
US9078328B2 (en) * 2013-03-14 2015-07-07 Grote Industries, Inc. Vehicle lighting outage detection circuit
DE102014107947A1 (en) 2014-06-05 2015-12-17 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh LED unit with voltage monitoring, use of such a LED unit and LED light with such a LED unit
DE102016103871A1 (en) * 2016-03-03 2017-09-07 Washtec Holding Gmbh Method and device for automatically detecting the configuration of luminous elements connected in series
DE102018201367A1 (en) * 2018-01-30 2019-08-01 Osram Gmbh CIRCUIT ARRANGEMENT FOR OPERATING AT LEAST ONE LED STRING TO A CHANGE OR DC VOLTAGE SOURCE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061301A1 (en) * 2006-11-20 2008-05-29 Lednium Technology Pty Limited A fault detector and a fault detection process for lighting
US20090085489A1 (en) * 2007-09-28 2009-04-02 Chunghwa Picture Tubes, Ltd. Circuit and method for driving and controling light source

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778481B1 (en) * 1998-05-05 2000-06-23 Sagem METHOD FOR MANAGING A SOURCE OF ROAD SIGNALING LIGHT
DE10324609B4 (en) * 2003-05-30 2014-11-13 Osram Gmbh Control circuit and LED array and method for operating an LED array
DE102005012625B4 (en) * 2005-03-18 2009-01-02 Infineon Technologies Ag Method and circuit arrangement for controlling LEDs
US7800876B2 (en) * 2006-01-09 2010-09-21 Microsemi Corp. - Analog Mixed Signal Group Ltd. Fault detection mechanism for LED backlighting
JP4457312B2 (en) * 2006-01-12 2010-04-28 株式会社デンソー Vehicle headlamp device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061301A1 (en) * 2006-11-20 2008-05-29 Lednium Technology Pty Limited A fault detector and a fault detection process for lighting
US20090085489A1 (en) * 2007-09-28 2009-04-02 Chunghwa Picture Tubes, Ltd. Circuit and method for driving and controling light source

Also Published As

Publication number Publication date
WO2012136640A2 (en) 2012-10-11
EP2695488B1 (en) 2018-01-24
EP2695488A2 (en) 2014-02-12
DE102011053491A1 (en) 2012-10-04

Similar Documents

Publication Publication Date Title
WO2012136640A3 (en) Headlight having light-emitting diodes
EA201490354A1 (en) SYSTEMS AND METHODS OF DIAGNOSTICS OF AUXILIARY EQUIPMENT RELATED TO THE ENGINE
PH12014501214A1 (en) Fault diagnosis of a lift system and the components theereof by means of a sensor
MX2017007083A (en) Current splitter for led lighting system.
WO2009116854A3 (en) Led assembly, led fixture, control method and software program
BR112013005127A2 (en) method and devices for providing real-time interface of a plurality of moving elements to a computerized system
CR20150022A (en) METHODS AND COMPOSITIONS TO DETERMINE THE RESISTANCE TO THERAPY WITH ANDROGEN RECEIVER
WO2014184634A8 (en) Illuminating device, illuminating method, program, and medium
WO2015160415A3 (en) Systems and methods for visual sentiment analysis
BR112016007121A2 (en) method for acoustic analysis of a machine, system for acoustic analysis of a machine and product
MX2014008387A (en) Gear inspection apparatus.
WO2012119126A3 (en) Apparatus, system, and method for automatic identification of sensor placement
BR112012032346A2 (en) LED-based lighting on-board diagnostic method
WO2012109471A3 (en) Method to identify faults in led string
RU2014137325A (en) DEVICE AND METHODS FOR LIGHTING CONFIGURATION USING DISTANCE SENSORS
MX2014013750A (en) On-board diagnostic method and system for detecting malfunction conditions in multiair tm engine hydraulic valve train.
MX2016010525A (en) Device, system and method for determining vital signs of a subject based on reflected and transmitted light.
MX2015009714A (en) Automatic grouping via light and sound.
WO2011056958A3 (en) Detection of traumatic brain injury
MX2017003584A (en) Smart light assembly and smart lighting system for a motor vehicle.
DE112012000899A5 (en) Device for connecting and contacting at least one LED unit, as well as LED unit and lighting system
BR112017013938A2 (en) semblance method, computational installation to process waveforms, and sonic profiling system.
BR112017006767A2 (en) test arrangement and method for testing a switching system
FR2986326B1 (en) OPTICAL METHOD FOR INSPECTING TRANSPARENT OR TRANSLUCENT ARTICLES TO ASSIGN AN OPTICAL REFERENCE ADJUSTMENT TO THE VISION SYSTEM
DE602007003962D1 (en) SAFETY METHOD FOR DIAGNOSTIC SYSTEMS

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12720439

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2012720439

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE